Herbert harbison



Patented Aug. 1, 1876"..

H. HARRISON.

FURNACE.

N-PFERS, PHOTD-LITHOGHAFHER. WASHINGTON. D. C.`

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HERBERT HARRISON, 0F GODER'IGH, ONTARIO, CANADA.

IMPROVEMENT IN FURNACES.

. Specitication forming part of Letters Patent No. E0,7, dated August 1,1876 application filed June 23, 1576.

To all whom 'it may concern:

Be it known that I', HERBERT HARRISON, of Godericlnin the county ofHuron, Province of Ontario, Canada, have invented a new and usefulmprovcmentin Furnaces or Heat-Producing Apparat-us; and-l do herebydeclare that the following is a full, clear, and exact descriptionthereof', which will enable others skilled in the art to which itpertains to make and use the same, reference being had to theaccompanying drawing', and to the letters ot reference marked thereon,which form a part of this speciiication.

M y invention relates to an improved method of constructing furnaces orheat-producing apparatus, the object of such being' to attain a moreperfect combustion of the smoke-and volatiie products oi' the fuel thanby the methods heretofore adopted; and my invention consists incombining, with a series of furnaces, combustion-chambers, one of whichis arranged between each two ofthe series of furnaces employed, wherebythe products generated by the combustion ofthe fuel in the furnaces arecaused to pass into and through such chambers, where secondary orperfect combustion ofthe unconsumed carbon or smoke and gases takesplace, such chambers being charged with any required amount of air oroxygen.

ln the said drawing, Figure l is a front end elevation of an apparatusembodying my improvement, as applied to a salt-making apparatus. Fig. 2is a front elevation with the end plate removed. Fig. 3 is a transverseand vertical sectiolntakeu 'through the furnaces andcombustion-chambers. Fig. 41.- is a top View with the evaporating-panremoved. Fig. 5 is a horizontal section taken through the air-inductsleading to the two combustion-chambers.

In carrying out my invention, l arrange a series of furnaces, A A A, ina suitable framework, B, the furnaces being of the ordinaryconstructiomwith theexception that the arched domes are madefora-minous, in order to allow a part of the heat to rise and impin geagainst the bottom of the pan or the floor above. C C are two chambers,one of which is disposed between each two ofthe furnaces, the bottom ofeach of the chambers being disposed on a plane with the gra-tes of thefurnaces. Each of these chambers communicates by means of openings a a,with the furnaces ou opposite sides of it, so as to permit the smoke andvolatile products to pass from the furnaces into such chambers. The archor dome Aof each chamber is 'ormedelosed or unperforated, the object ofsuch being to conlne the smoke and gases while undergoing combustion. DD are two air-pipes, having their induction ends arranged in the frontplate or wall E, such pipes extending horizontally around the outerfurnaces, and havin g their cductiou ends respectively opening into thechambers C U', as shown in Fig. 5. Each of the pipes D is provided witha cock or register, d, by which the quantity of air introduced into thechambers may be regulated at pleasure. G G are steam-pipes connectedwith any suitable Steamgeneratm, such pipe extending through the sidesor walls ofthe case, and respectively into the elbows ofthe pipes D D,as shown in Fig. 5, the object of such steam-pipes beingto createsteaminduced currents of air to mingle with the uliconsumed smoke andgases in the chambers C C. H H H H are four tire-brick ues, which aredisposed-011 the tops of the walls separating the furnaces from the chambers C C. Each of these dues near its outer end is formed with a recess,c, which communicates with one ot' the chambers C, 'as shown in Fig. 2,the object of such being to permit the pure caloric contained in suchchambers to rush in and fill the vacuum which is creat-ed in the tluesH, by means of a jet of steam, which is introduced through pipes Gr,from any convenient generator, extending through the front wall of theapparatus, and concentric-ally into the fines H, such steam-jets causinga strong draft through the ilues, and forcing therproducts ot'combustion through the eduction end e of the ilues, (which extendthrough the rear walls f of the furnace,) as shown in Fig. 4, andunderneath the drying-door or evaporating-pans.

When the furnaces are in operation I lire the side furnaces alternatelywith the central one the latter l prefer to make of greater cubicalcapacity than the side furnaces. By this method ot' iring I am enabledto obtain complete con trol over the smoke, intense heat being, asnecessary, an element in obtaining complete combustion as a due supplyof oxygen. It will thus be found than when the coal in the two sidefurnaces has burned down brightly and clear7 and fresh coal is placed inthe central one, the clear heat ofthe side furnaces meeting theunconsumed carbon of the fresh fuel from the central one in chambers G,Where a supply of air is provided, perfect coinbustion will take place.

'hen Ishe Haine of the central furnace has become bright and clear, theside furnaces are to be charged with fresh coa-l, the clear heat of suchcentral furnace passing into the chambers C C', and coming in contactwith the smoke and gases evolved from the fuel in the side furnaces, andbeing furnished With any desired quantity of air ywill, as before,produce perfect combustion.

lem/H5 Having described my invention, what l claim is The combination ofthe furnaces A A! A, with the chambers C C', having communication, asdescribed, and the air inducts D I), steam-pipes G Gr, cocks d d, andthe educticn- '[lues H H, -Stc., the Whole being` constructed andarranged substantially in manner, and so as to operate as set forth.

In testimony that I claim the foregoing as my own invention I affix mysignature in presence of two Witnesses.

HERBERT HARRISON.

Witnesses:

ALMoN A. THoMPsoN, Roys I. CRANE.

